<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link />
  <title>Document</title>
</head>
<body>
  <section>
	  <article class="green">
      <div class="blue"></div>
      </article>
  </section>
</body>
</html>